Doulton® Biotect® Ultra SI (2505)

To target the effects of limescale in your water, the Biotect Ultra SI may be your ideal solution. Compatible with Doulton-branded under sink and tap-mounted countertop water filter systems (EcoFast, Doulton DUO and Doulton TRIO systems), it has a ceramic exterior with an activated carbon core and uses a limescale-inhibiting media to reduce limescale deposits on your appliances and metal surfaces in contact with your water. As with the Biotect Ultra filter from Doulton, the Biotect Ultra SI also reduces common contaminants in your water whilst retaining the minerals that benefit your health. Alongside inhibiting the deposits from limescale, the Biotect Ultra SI filter also reduces: Microplastics Chlorine Bacteria and cysts Insecticides and herbicides Heavy metals such as lead, cadmium and mercury. For more information on our testing data for the Biotect Ultra SI, please visit our test data page. If you are looking to specifically target contaminants of concern in your water, you may want to explore our DUO and TRIO under sink systems that allow for enhanced targeting with add-on cartridge options. You can also take our water quiz to find out the best fit for your needs.